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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Nexperia USA Inc. BAV21,143

Name: BAV21,143
Brand: Nexperia USA Inc.
SKU: BAV21,143
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BAV21,143

Manufacturer:: Nexperia USA Inc.

Category:: Single Diodes

Package:: DO-204AH, DO-35, Axial

Datasheet:: BAV21,143.pdf

Description:: DIODE GEN PURP 200V 250MA ALF2

Quantity:: RFQ Add To RFQ list

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Inventory:4,833

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Product details

Overview

BAV21,143 from NXP Semiconductors is a hermetically sealed glass axial-leaded switching diode in SOD27 (DO-35) package, rated for 250 V repetitive peak reverse voltage and 625 mA repetitive peak forward current, with 50 ns reverse recovery time. It serves as a high-speed rectifier or signal clamping device in video output stages, digital voltmeters, and oscilloscope front-end circuits.

For engineers reviewing the BAV21,143 datasheet, BAV21,143 pinout, BAV21,143 application, or BAV21,143 equivalent, key selection criteria include reverse recovery time, peak reverse voltage rating, thermal resistance (240 K/W junction-to-tie-point), forward voltage at 200 mA (≤1.25 V), and DO-35 mechanical compatibility in space-constrained analog signal paths.

Technical Context

The BAV21,143 is a planar silicon switching diode optimized for general-purpose high-speed operation. Its 50 ns trr and low 5 pF capacitance at 0 V enable clean signal edge handling in video and test equipment signal chains.

It operates with a maximum junction temperature of 175 °C and exhibits reverse leakage ≤100 nA at VR = 250 V and 25 °C, rising to ≤100 μA at 150 °C - critical for stable biasing in thermally varying industrial environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	250 V - supports input rectification or clamping in 200 V AC-derived rails without avalanche breakdown
t_rr	50 ns - enables reliable operation up to ~10 MHz switching in pulse shaping and sample-hold circuits
I_FRM	625 mA - sustains transient overloads in protection paths without bond-wire fusing
V_F @ 200 mA	≤1.25 V - limits conduction loss to <250 mW in continuous forward-biased applications
C_d @ 0 V	5 pF - minimizes capacitive loading on high-impedance video or RF detector nodes
R_{th j-tp}	240 K/W - defines thermal bottleneck between junction and PCB tie-point under pulsed load conditions

Pinout & Package

Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a black band. Leads are tinned copper-clad steel, suitable for wave or hand soldering per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node during conduction; requires thermal relief pad for >250 mA DC operation
Cathode	Forward current exit / reverse blocking terminal	Marked with black band; ties to higher-potential rail in clamp or freewheeling configurations

Key Features

Feature	Design Value
Hermetic glass seal	Prevents moisture-induced parameter drift and long-term leakage increase in humid industrial enclosures
50 ns reverse recovery	Enables use in 10–20 MHz signal routing without waveform distortion or ringing in video sync circuits
250 V V_RRM	Supports direct interface with CRT anode supplies or flyback transformer secondary outputs
Low 5 pF capacitance	Maintains >30 MHz small-signal bandwidth in probe compensation networks and RF detector inputs

Applications

Video Output Stage

Digital Voltmeter Input Protection

Use Scenario: Clamping CRT grid drive signals to prevent overvoltage damage during blanking intervals.

IC Role / Device Role / Timing Role: Fast-switching clamp diode placed between grid and reference rail.

Use Value: 50 ns t_rr ensures minimal overshoot; 250 V V_RRM withstands flyback spikes up to 220 V peak.

Use Scenario: Protecting high-impedance ADC input from ESD and overvoltage transients.

IC Role / Device Role / Timing Role: Bidirectional shunt limiter in series with input resistor network.

Use Value: Low 5 pF capacitance avoids signal attenuation above 1 MHz; 100 nA IR preserves DC accuracy.

Oscilloscope Vertical Amplifier

Colour TV Chroma Demodulator

Use Scenario: DC restoration in wideband vertical deflection amplifiers using diode clamping.

IC Role / Device Role / Timing Role: AC-coupled clamp diode synchronized to vertical sync pulse.

Use Value: Stable 1.25 V V_F at 200 mA ensures predictable clamping level across temperature.

Use Scenario: Carrier recovery phase detection in PAL/NTSC chroma demodulation circuits.

IC Role / Device Role / Timing Role: Precision zero-crossing detector feeding PLL comparator.

Use Value: 50 ns t_rr and low C_d preserve 3.58/4.43 MHz carrier integrity and minimize jitter.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed general-purpose diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BAV21W,115	SOD-123 surface-mount package; identical electrical specs except R_{th j-a} = 450 K/W	Requires PCB rework for SMT assembly; unsuitable for through-hole prototyping or legacy repair	Select when automated assembly and board space reduction outweigh manual serviceability needs
1N4148WS	Lower V_RRM (100 V); faster t_rr (4 ns); same DO-35 package	Inadequate for >150 V applications like CRT anode clamping or flyback snubbing	Prefer only in low-voltage, ultra-high-speed logic gating or sampling where voltage margin is not required

Compared with BAV21,143, the BAV21W,115 offers identical performance in a smaller footprint but sacrifices thermal robustness, while the 1N4148WS trades voltage capability for speed - making BAV21,143 the optimal balance for 200–250 V, sub-50 ns general-purpose switching.

Availability

BAV21,143 is available at Aetrix Electronics and suitable for video output stages, digital voltmeter input protection, oscilloscope vertical amplifiers, and colour TV chroma demodulators requiring stable component supply across extended production lifecycles.

Supply support for BAV21,143 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The BAV21,143 belongs to NXP's legacy discrete diode product line, designed specifically for high-reliability analog signal conditioning and protection in test and measurement, broadcast, and industrial instrumentation equipment.

FAQ

Is BAV21,143 suitable for high-frequency RF detector applications?

Yes - its 5 pF capacitance at 0 V and 50 ns reverse recovery support operation up to 30 MHz in envelope detection. Measured diode capacitance remains below 2 pF above 10 V reverse bias, preserving detector Q-factor in AM receiver front ends.

What is the maximum continuous forward current at 70 °C ambient?

Per Fig.2 in the datasheet, the derated continuous forward current is 175 mA at 70 °C ambient when mounted on FR4 with 10 mm leads. This reflects thermal limitation due to R_{th j-a} = 375 K/W, not semiconductor degradation.

Does BAV21,143 have a specified surge current rating?

Yes - it supports non-repetitive peak forward current of 9 A for 1 μs, 3 A for 100 μs, and 1 A for 1 s (square wave, T_j = 25 °C initial). These values are defined in the Limiting Values table and validated per IEC 60134.

Can BAV21,143 replace BAV20 in existing designs?

Yes - both share identical package, pinout, and forward characteristics, but BAV21,143 offers higher 250 V V_RRM vs. BAV20's 200 V. No layout change is needed; design margin improves for 200–250 V reverse stress conditions.

BAV21,143 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: DO-204AH, DO-35, Axial

Packaging:: Cut Tape (CT)

Product Status:: Obsolete

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 200 V

Current - Average Rectified (Io):: 250mA

Voltage - Forward (Vf) (Max) @ If:: 1.25 V @ 200 mA

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 100 nA @ 200 V

Capacitance @ Vr, F:: 5pF @ 0V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: ALF2

Operating Temperature - Junction:: 175°C (Max)

BAV21,143 FAQ

1.How can I place an order for BAV21,143 through Aetrix?

Please submit a Request for Quotation (RFQ) for BAV21,143 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BAV21,143 reliable?

The price and inventory of BAV21,143 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAV21,143 is usually 5 days.

3.What payment methods are accepted for BAV21,143?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAV21,143 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BAV21,143?

BAV21,143 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BAV21,143 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BAV21,143?

For technical support, including BAV21,143 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAV21,143 requirements.

6.How does Aetrix verify that BAV21,143 is sourced from the original manufacturer or authorized distributors?

All BAV21,143 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BAV21,143 meets industry standards.

7.What is the process for return or replacement of BAV21,143?

All BAV21,143 units undergo pre-shipment inspection (PSI). If there is an issue with BAV21,143, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BAV21,143 part is unused and in its original packaging.

Return procedure for BAV21,143:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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